<!DOCTYPE html>
<html>

<head>
	<meta charset="utf-8">
	<title>CSS 菜单按钮切换(打开/关闭)</title>
	<link rel="stylesheet" href="./style.css">
</head>

<body>
	<main class="main">
		<p>点击菜单按钮变为 "X":</p>
		<div class="container" title="点击展开">
			<div class="bar1"></div>
			<div class="bar2"></div>
			<div class="bar3"></div>
		</div>
	</main>

	<script src="./index.js"></script>
</body>

</html>